EP1146278A2 - Lighting device, in particular for signal lamp - Google Patents

Abstract

A lamp (1), in particular for a signal lamp with at least one LED (13), which is attached to an LED printed circuit board (12), is proposed, which enables a less complex and flexible production. This is achieved according to the invention in that a base housing (2) is made of plastic and the base housing (2) is penetrated by at least two contact elements (6). <IMAGE>

Description

The invention relates to a lamp, in particular for a signal lamp according to the preamble of claim 1.

Various illuminants have already become known, who use light-emitting diodes (LED) as the light source. On such illuminant is used, for example, in the Utility model DE 298 06 589 described. The illuminant according to this prior art has a T-shaped Printed circuit board on, with the narrower, lower part extends into the base of the lamp, where the outside electrical connections. in the upper, wider part of the circuit board are several LEDs attached.

In contrast, the invention has the task of a lamp propose that the manufacturing is less expensive and Inexpensive, especially in large quantities can be.

This task is based on a prior art type mentioned in the introduction by the marked features of claim 1 solved.

By the features mentioned in the subclaims advantageous embodiments and developments of the invention possible.

Accordingly, an illuminant according to the invention is also used a plastic base housing. In addition to the offers cheaper production in large quantities Plastic case the advantage of electrical and thermal insulation.

The contacting of the circuit board is thereby accomplished that at least two contact elements be provided, which penetrate the housing of the base. By means of the contact elements, despite the insulating Property of the base housing the lamp with electricity be charged.

The contact elements are preferably arranged so that they penetrate a base plate of the base housing. This allows a base to be designed that in Standard frames can be used and at the usual Contact points when plugging into the corresponding socket makes the necessary contact. The contact elements can are designed here, for example, as contact pins, that not only establish external contact, but at the same time down to the components to be contacted inside the Protrude into the base.

In a preferred embodiment of the invention, the Contact elements at the same time with cutting and / or locking elements provided that serve to fix in the base. The Cutting elements can for example be in the form of e.g. sawtooth-shaped external teeth on the contact pins are formed, when pressed into the base material cut and so at least partially with the Toothed base plate, whereby the contact elements after Impressions are fixed. Also locking elements with which the Contact elements on the base would be locked in another embodiment conceivable.

In a particular embodiment of the invention, a essential base plate perpendicular to the LED circuit board provided that connected to contact elements of the base is. This design allows the base to be Base plate for different sized lamps each run right away.

Depending on the desired shape, only the LED circuit board is required modified according to size and shape become.

In particular using one with the named electronic components populated circuit board as Base plate in connection with pin-shaped contact elements is a base for an illuminant according to the invention particularly easy to assemble. In this case only the contact pins from the bottom plugged in and with the from the top of the base placed base plate to be connected to the To finish base unit.

The contact pins can be connected to the base plate can be realized in different ways. So at this Place for example a plug, press and / or Solder connection to be provided. To simplify the Assembly of the base according to the invention are solderless Prefer connections. Especially in the case of a Plug connection thus results in an extremely simple Base assembly by plugging the three mentioned together different components, i.e. the contact pins of the Base housing and the base plate.

This base with the essentially transverse Printed circuit board can in a further development of the invention at the same time contain electronic components, so that the A complete base for a modular base Illuminant structure represents. The components can do this either on the base plate or due to the insulating property of the base housing also without problems be accommodated in the base housing. With help such electronic components is the base as complete connection module for a variety of different Design lights.

For example, the low-voltage Power supply required circuits in the base to get integrated. Other functions, e.g. Blinking functions, color controls or the like can in the base design according to the invention can be accommodated. May be more complex when using Controls also one or more control lines from the Sockets for contacting are routed to the outside.

The electronic components in the base housing or on the Base plate can also be electrical, for example Include circuits that test the immunity of the Increase illuminant. For example electronic magnetic impulses, so-called surge and burst impulses, e.g. by lightning or by Power cuts in the power grid can be caused intercepted with the help of such an electrical circuit and be defused. This results in a significantly higher one Lifespan of a lamp with the illuminant according to the invention.

In addition, it is easily possible if necessary several LED circuit boards, for example in one Triangle arrangement for improved all-round lighting a base with the aforementioned transverse base plate build up.

To complete the lamp, a Base according to the invention equipped with an LED circuit board. This circuit board is essentially transverse to the base plate put on and contacted. Come for contacting again different connection types in question, for example a plug, press or solder connection. In turn, solderless connections offer the advantage of simplified assembly.

Especially in the case of a plug connection, the further construction of the lamp according to the invention only the desired LED circuit board from a corresponding Assortment selected and put on.

In a special embodiment, additional Fasteners for other components in the Molded base housing. This is mainly due to the Plastic production of the base housing possible and without problems simplifies assembly, for example the base plate or a cover on the base housing. As a fastener come all conceivable designs, for example a bayonet lock or threaded connector, etc. in question.

In a particularly advantageous embodiment, the Fastening elements, for example for fixing the Base plate or a calotte, designed as a locking element, so a particularly simple and possibly again detachable assembly of the corresponding component is possible.

When pressing the base plate into such locking elements can, e.g. in the case of a plug connection, one at the same time Contacting and fixing the base plate in the cover for the base housing.

In a development of the invention, a transparent Dome provided as a cover covering the LED circuit board or LED circuit boards and with the base element is connected. The closure with the base can be opened designed to be detachable or non-detachable in different ways become. For example, the spherical cap with the base be glued or welded. Even detachable connections, for example, a snap or bayonet lock are depending on Purpose of use conceivable.

The calotte can have a smooth outer surface a special embodiment but also with Light guiding elements, for example with lens profiles Mistake. With the help of such a dome structure influences the radiation characteristics of the lamp become. Prismatic structures can also be used Realization of a desired radiation pattern be provided.

In addition to the function with regard to the radiation characteristics the bulb also fulfills a protective and Insulation function. For example, the inside of the Bulb protected from dirt by the calotte. In addition, the calotte is a protection against contact, because they are both electrically and thermally insulated.

This protection and isolation function can be performed if required a seal between the calotte and the base of the Illuminants can be further improved.

Deviating from the dome shape mentioned above, the Dome in other designs both outside and inside be smooth and / or corrugated.

In a particular embodiment of the invention also guide and fixing elements for the LED circuit board intended. These can, for example, in the base housing or can also be provided in the base plate. In advantageous However, manner is additionally in the calotte appropriate fixation element attached. Such one Fixing element can be inside the calotte on the top be provided so that in combination with a Attachment to the base plate or base comparatively large guide length and thus a stable Fixing the LED circuit board results.

The contact pins that make up the base plate of the base enforce, can not only be electrically conductive, but are also designed to be thermally conductive and thus the Favor heat dissipation from the interior of the lamp.

In the embodiment with the spherical cap mentioned above with the help of a lamp according to the invention produce a complete luminaire in a particularly favorable way. For In this case, the completion of a complete luminaire is required only one socket for inserting the lamp, the corresponding mounting elements for fixing on desired location for all desired types of installation, e.g. B. for floor mounting, angle mounting, central mounting, etc., has. Such a version can be, for example External thread for fastening in a machine housing, one Have a stand or the like. With the onset of Illuminant in the appropriate version for one electrical connection, for example conventional cable clamps the complete luminaire is complete, without a complex luminaire housing for inserting a Illuminant with additional cap is required.

For such a complete lamp, it is recommended in one special embodiment, a seal between the Provide socket and the base of the lamp, so that the electrical contact points between the socket and the Illuminant against the ingress of dust and / or water are protected.

An embodiment of the invention is in the drawing shown and will be explained in more detail below with reference to the figures explained.

Figur 1

einen Querschnitt durch ein erfindungsgemäßes Leuchtmittel,

Figur 2

eine Darstellung eines Leuchtmittels gemäß Figur 1 mit größerer LED-Leiterplatte,

Figur 3

eine den Figuren 1 und 2 entsprechende Darstellung einer weiteren Ausführungsform der Erfindung,

Figur 4

eine Draufsicht auf die Kalotte eines Leuchtmittels gemäß Figur 1 oder 2,

Figur 5

eine Seitenansicht eines Kontaktstiftes eines erfindungsgemäßen Leuchtmittels,

Figur 6

eine Draufsicht auf ein Kontaktstift gemäß Figur 5,

Figur 7

eine Stirnansicht eines Kontaktstifts gemäß den Figuren 5 und 6,

Figur 8

einen Teilschnitt durch eine Komplettleuchte mit einem erfindungsgemäßen Leuchtmittel und

Figur 9

einen Teilschnitt eines weiteren Ausführungsbeispiels einer Komplettleuchte.

Show in detail

Figure 1

3 shows a cross section through an illuminant according to the invention,

Figure 2

1 shows a light source according to FIG. 1 with a larger LED circuit board,

Figure 3

2 shows a representation corresponding to FIGS. 1 and 2 of a further embodiment of the invention,

Figure 4

2 shows a plan view of the spherical cap of a lamp according to FIG. 1 or 2,

Figure 5

2 shows a side view of a contact pin of an illuminant according to the invention,

Figure 6

3 shows a top view of a contact pin according to FIG. 5,

Figure 7

3 shows an end view of a contact pin according to FIGS. 5 and 6,

Figure 8

a partial section through a complete lamp with an illuminant according to the invention and

Figure 9

a partial section of a further embodiment of a complete lamp.

The illuminant 1 according to FIG. 1 comprises a base housing 2 with a base plate 3 and a cantilever 4. Are on the side attached to the base housing 2 two bayonet warts 5, with which the base used in common bayonet sockets and can be fixed.

Contact pins 6, which are described in more detail below be described, enforce the bottom plate 3 of the Base housing 2 and are bottom with a Contact plate 7 flat on the bottom plate 3 of the Base housing 2.

The projection 4 of the base housing 2 are spacers 8 molded in a manner not shown with a Insert a base plate 9 through the tapered section.

The base plate 9 is over the spacers 8 and over Locking hook 10 connected to the base housing 2, the Contact pins 6 with a connecting element 11 of the Base plate 9, for example with the help of a plug contact are connected.

An LED circuit board is essentially perpendicular to the base plate 9 12 attached to the base plate 9. The LED circuit board carries several LEDs 13 together with the Circuit for electrical not shown Care. The LEDs can be wired, for example in SMD technology or as so-called chip on board elements be trained.

On the cantilever 4 of the base housing 2 is one transparent cap 14 placed. The calotte 14 is on provided their underside with locking openings 15, in which not Locking elements of the base housing 2 shown in more detail can intervene. The calotte 14 is at the top a bulge 16 provided on the inside of a Guide 17 for receiving an extension 18 of the LED circuit board 12 is attached. This is the LED circuit board 12 in their position inside the calotte 14 fixed.

The embodiment according to FIG. 2 is essentially identical to that of Figure 1, now one Larger LED circuit board 12 'is used, which is another Row of light emitting diodes 13 'and a correspondingly higher one Dome 14 compared to the aforementioned embodiment includes.

Figure 3 corresponds essentially to the embodiments according to FIGS. 1 and 2. Deviating from this is a electronic component 19 in the base area of the Base housing 25 accommodated. This is through the Use of plastic to form the base housing 25 due to the insulating properties without problems further security measures possible.

The course of the contact pins 6 is also shown in FIG the contact plate 7 from outside the bottom plate 3 along the base housing 2 recognizable inside the base 25.

In Figure 4, the cap 14 is shown in plan view. The outer profile 20 turns out to be a circumferential one Series of concave cylindrical lenses 21. Also an inner profile of the calotte e.g. with corresponding Lens function would be just as conceivable as its use prismatic structures to achieve the desired Scattering characteristics. The bulge 16 is, especially in 3 recognizable not circular but with a elongated outer contour, so that the bulge 16 not only to accommodate the guide 17, but also as Handle for the entire lamp 1 when inserted into one Socket and when turning to close the Bayonet lock is used.

In Figures 5 to 7 is a contact pin 6 before assembly shown. It essentially consists of one Flat material that can be punched, for example. The Contact pin 6 has a longitudinal part 22 to bridge the Distance between the contact plate 7 and the Connecting element 11. The contact plate 7 is through a Bend formed. A tapered plug tip 23 is used for insertion into the connecting element 11 of the base plate 9 (see Fig. 1). In the area of the contact plate 7 Saw teeth 24 attached in the longitudinal part 22 of the contact pin 6, around the contact pin 6 in the pressed state in the To fix the base plate 3 of the base housing 2.

The oval shape of the contact plate 7 can be seen in Figure 7. It is shaped in such a way that it is more conventional than the contact form Lamp or illuminant corresponds, so that commercially available Luminaire sockets for the illuminant according to the invention are usable.

In the described embodiment, the base housing 2 readily formed as a plastic part, wherein all additional elements, for example the spacers 8 or the locking hook 10 can be injection molded.

For assembly, the contact pins 6 are then through the Pressed in the base plate, where it can be Base material incisive saw teeth 24 are fixed. The base plate 9 can now be placed on the spacers 8 put on and locked with the locking hook 10. On in this way, the base 25 is assembled as a finished module and stands for the construction of different versions of Illuminants 1, 1 'are available, for example with different sized LED circuit boards 12, 12 'with the correspondingly associated domes 14, 14 '.

In addition to the connecting element 11, the base plate 9, such as already mentioned a variety of different electronic components, for example for Power supply to the LED 13, for interference protection against high Voltage pulses or a controller for control various functions, for example a flashing function, a color control, etc. can be provided. Such Components can not only on the base plate 9, but also in the entire base area below the base plate 9 be brought under.

The structure of the illuminant 1 according to the invention results a simple, inexpensive and extremely flexible Manufacturing for different lamps 1, 1 'under Using the same pre-assembled base 25, the at least the base housing 2, the contact pins 6 and the Includes base plate 9.

Furthermore, with an illuminant according to the invention manufactured a complete lamp in a particularly simple manner become. Such a complete lamp 26 is shown in FIG. 8 shown. The illuminant 27 essentially corresponds the prescribed embodiments 1, 1 ', of which deviating from the calotte 28 a round curved top 29 without the bulge 16 has the inner guide 17. Accordingly, the concave lenses 30 are also for Top 29 arched out and in the course of the curvature up to flattened to the central axis M of the illuminant 27.

The illuminant 27 is inserted in a socket 31 and there, for example with the help of one described above Bayonet lock fixed. A sealing ring 32 ensures this for a tight seal between the base housing 2 and the version 31. The version 31 is with a screw thread 33 for attachment to the desired location. By inserting the illuminant 27 into the socket 31 the result is a complete luminaire.

For the electrical connection of the complete lamp 27 is the Version 31 in this embodiment with usual Provide cable clamps 34.

The socket 31 is used to mount the complete lamp of the external thread at the desired location, for example a machine housing, in a control panel, etc., if necessary, a sealing ring to seal the socket can be underlaid. The electrical connection with the Cable clamps 34 then take place inside the socket in the usual way instead. When the lamp 27 is plugged in the complete lamp 26 is complete. In addition to the particularly easy manufacture while saving a separate one Luminaire housing offers this complete lamp 26 with the Illuminant 27 according to the invention has the further advantage of easy replacement of the lamp, for example in the event of a defect or in the event of a Function change, for example to change the color or other lamp functions.

9 is another embodiment of a Complete lamp shown. The complete lamp corresponds in the details not detailed below aforementioned embodiments.

In contrast to the complete lamp shown in FIG. 8 is now the illuminant 35 with an externally smooth cap 36 Mistake. On the inside of the smooth and round arch Dome 36 are scatter elements 37 attached to the Radiation characteristic of the lamp 35 in the desired way to influence.

The illuminant 35 is inserted in the socket 31 and locked there by means of the bayonet wart 5. In doing so, a electrical contact via the contact plate 7 to the corresponding contact element 41 of the socket 31 closed.

As in the aforementioned exemplary embodiment, the socket is 31 with an external thread 33 for mounting on the desired Provide location. For this there is one Sealing washer 38 and a union nut 39 are provided, with which the complete lamp, for example, in one Housing bore can be screwed.

Furthermore, it differs from the above Exemplary embodiment the contacting of the socket 31 provided in the present case via flat plug 40 to which conventional connector sleeves pushed on as contact elements can be.

Reference symbol list:

1

Illuminant

2nd

Base housing

3rd

Base plate

4th

Cantilever

5

Bayonet wart

6

Contact pin

7

Contact plate

8th

Spacers

9

Base plate

10th

Locking hook

11

Fastener

12th

LED circuit board

13

led

14

Calotte

15

Rest opening

16

bulge

17th

guide

18th

Continuation

19th

electronic component

20th

Outer profile

21

Cylindrical lens

22

Longitudinal part

23

Connector tip

24th

Saw teeth

25th

base

26

Complete lamp

27

Illuminant

28

Calotte

29

Top

30th

Concave lenses

31

Frame

32

Sealing ring

33

Screw thread

34

Cable clamps

35

Illuminant

36

Calotte

37

Scattering element

38

Sealing washer

39

mother

40

Flat connector

41

Contact element

Claims (16)

Illuminant, in particular for a signal lamp, with at least one LED (13) which is attached to an LED circuit board (12) and with a base (24), characterized in that a base housing (2) is made of plastic and the base housing ( 2) is penetrated by at least two contact elements (6). Illuminant according to claim 1, characterized in that the contact elements (6) penetrate a base plate (3) of the base housing (2). Illuminant according to one of the preceding claims, characterized in that cutting and / or latching elements (24) are provided for fixing the contact elements (6) in the base housing (2). Illuminant according to one of the preceding claims, characterized in that a base plate (9) which is transverse to the LED circuit board is provided, which is connected to the LED circuit board (12) and connected to the contact elements (6, 7) of the base (25) is. Illuminant according to one of the preceding claims, characterized in that a plug, solder and / or press connection is provided for connecting the contact elements (6) to the base plate (9). Illuminant according to one of the preceding claims, characterized in that electronic components are arranged in the base (25) and / or on the base plate (9). Illuminant according to claim 1, characterized in that a plurality of LED circuit boards (12) are provided. Illuminant according to one of the preceding claims, characterized in that a solder-free connection between the base plate (9) and the LED circuit board (12) is provided. Illuminant according to one of the preceding claims, characterized in that fastening elements for further components are molded into the base housing (2). Illuminant according to one of the preceding claims, characterized in that the fastening elements are designed as latching elements (10). Illuminant according to one of the preceding claims, characterized in that a transparent dome (14) is provided for the base housing (2). Illuminant according to one of the preceding claims, characterized in that the cap (14) comprises light guide elements (20). Illuminant according to one of the preceding claims, characterized in that the spherical cap comprises a guide element (17) for the LED circuit board (12). Illuminant according to one of the preceding claims, characterized in that a seal is provided between the spherical cap and the base housing. Complete luminaire with a lamp and a socket for mounting on site, characterized in that the lamp is designed according to one of claims 1 to 14 and a socket 31 is provided for receiving the base (24). Complete lamp according to claim 14, characterized in that a seal is provided between the socket (31) and the base of the lamp.

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